I've been trying to install my new EG4 LifePower4 24v battery pack in my RV and have hit a wall. I certainly hope that you have an easy solution. This one is stumping me.
1) I'm simply attempting to replace my existing 12v FLA battery pack with my new EG4 24v pack.
2) I'm also replacing my existing 12v inverter with a new 24v inverter.
Here it is...
- 24v Aeliussine 2000 watt Pure Sine Wave Inverter
- https://www.amazon.com/gp/product/B08CMK1941/
3) It's a very simple install... only two cables... directly from the EG4 to the inverter... same cables as with the old 12v, perfectly functioning, system. I've temporarily removed the battery and inverter from the RV so no other circuits are involved. My Epever charge controller is NOT connected.
4) The problem is that I have a simple switch in the positive line so as to isolate the inverter. It's the same switch that I've used for years with my old 12v battery / inverter system. Here it is...
- 24V Battery Isolator Switch
- https://www.amazon.com/gp/product/B09J25P42X/
I've tried replacing the switch with another brand... same problem.
5) The problem is that the instant I flip that switch to connect the inverter the BMS throws 3 errors and cuts the circuit. The errors are:
- "Charging MOS off"
- "Discharging MOS off"
- "Short Circuit protection"
6) If I remove the switch entirely, connecting battery and inverter directly, and use the main breaker on the front of the EG4 as the isolator switch (just as a test) the battery boots up and plays just fine with the inverter. I don't want it to remove the isolator switch because I seldom use the inverter in my RV and don't want it running all the time due to parasitic drain issues.
7) I just don't see HOW a short circuit could occur... it's just two cables! I never observe any sparking when connecting the positive cable if that's a clue. I assume that the EG4 must have some sort of pre-charge capacitor to prevent that annoying event.
8) I know the EG4 is programmed to expect to be connecting to a Growatt controller/inverter unit... which I don't have. Perhaps there is a BMS setting that would prevent this but I'm unable to access the BMS parameters (no password).
Suggestions anyone?
Thanks
1) I'm simply attempting to replace my existing 12v FLA battery pack with my new EG4 24v pack.
2) I'm also replacing my existing 12v inverter with a new 24v inverter.
Here it is...
- 24v Aeliussine 2000 watt Pure Sine Wave Inverter
- https://www.amazon.com/gp/product/B08CMK1941/
3) It's a very simple install... only two cables... directly from the EG4 to the inverter... same cables as with the old 12v, perfectly functioning, system. I've temporarily removed the battery and inverter from the RV so no other circuits are involved. My Epever charge controller is NOT connected.
4) The problem is that I have a simple switch in the positive line so as to isolate the inverter. It's the same switch that I've used for years with my old 12v battery / inverter system. Here it is...
- 24V Battery Isolator Switch
- https://www.amazon.com/gp/product/B09J25P42X/
I've tried replacing the switch with another brand... same problem.
5) The problem is that the instant I flip that switch to connect the inverter the BMS throws 3 errors and cuts the circuit. The errors are:
- "Charging MOS off"
- "Discharging MOS off"
- "Short Circuit protection"
6) If I remove the switch entirely, connecting battery and inverter directly, and use the main breaker on the front of the EG4 as the isolator switch (just as a test) the battery boots up and plays just fine with the inverter. I don't want it to remove the isolator switch because I seldom use the inverter in my RV and don't want it running all the time due to parasitic drain issues.
7) I just don't see HOW a short circuit could occur... it's just two cables! I never observe any sparking when connecting the positive cable if that's a clue. I assume that the EG4 must have some sort of pre-charge capacitor to prevent that annoying event.
8) I know the EG4 is programmed to expect to be connecting to a Growatt controller/inverter unit... which I don't have. Perhaps there is a BMS setting that would prevent this but I'm unable to access the BMS parameters (no password).
Suggestions anyone?
Thanks